i know i will have to find out on my own slowly, but maybe someone has experience

will gargoyles tasks, nechs, and kurasks be able to pay for the cannonballs that
will kill the following tasks: spectres, bloodvelds, ankou, hellhound, fire giants, trolls and kalaphite?

No. Yu won't get the higher paying tasks reliably and often enough for them to cannon all those more often lower tier tasks. It'll offset a lot, but not cover it.

dang. i hope ur wrong lol

fire giants trolls and kalphite are comfy afk tasks tho?

I mean when you consider the fact gargoyles can actually drop steel bars + alchables it's very possible, same for nechs/kurasks assuming you're not bursting the nechs and such

I usually walk with at least 800K-1M at minimum per task on nechs when bursting (sit there on an alt picking up drops) and then gargs/kurask can vary due to the different drop tables

well im going to be doing an experiment to find out. just bought bandos so now with only 4m in my bank cash i will see
if the gp depetes to less than 1m then i have to conserve more

You haven't even factored p pots into your equation.
Who cares? Cannon what you can.

For real if you're not an iron why is this even a question. Go to ge and buy cannonballs.

Even if you are an iron, take the time to knock out 2k cballa or so every now and then